Adar Dembo has submitted this change and it was merged.

Change subject: rw_mutex: add configurable priority
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rw_mutex: add configurable priority

The glibc implementation of pthread rwlocks exposes priorities that can help
if avoiding reader or writer starvation is desirable. I have a use case for
the latter, so let's expose the priorities in our wrapper.

Note: pthread rwlock priorities don't exist on macOS, which is why they're a
"best effort".

Change-Id: I16ba6cd041f126c94e63fa07a1e84c88db6778d7
Reviewed-on: http://gerrit.cloudera.org:8080/3603
Tested-by: Kudu Jenkins
Reviewed-by: Todd Lipcon <[email protected]>
Reviewed-by: Dan Burkert <[email protected]>
---
M src/kudu/util/rw_mutex.cc
M src/kudu/util/rw_mutex.h
2 files changed, 54 insertions(+), 0 deletions(-)

Approvals:
  Dan Burkert: Looks good to me, approved
  Todd Lipcon: Looks good to me, approved
  Kudu Jenkins: Verified



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Gerrit-MessageType: merged
Gerrit-Change-Id: I16ba6cd041f126c94e63fa07a1e84c88db6778d7
Gerrit-PatchSet: 5
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Adar Dembo <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: Dan Burkert <[email protected]>
Gerrit-Reviewer: David Ribeiro Alves <[email protected]>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <[email protected]>

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